linux-kernel - Re: [PATCH v8 1/8] x86/cpu, kvm: Add support for CPUID_80000021

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Message-ID: <Y88eKn3/RKIaqJMv@google.com>
Date:   Mon, 23 Jan 2023 23:54:18 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Kim Phillips <kim.phillips@....com>
Cc:     x86@...nel.org, Borislav Petkov <bp@...en8.de>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Joao Martins <joao.m.martins@...cle.com>,
        Jonathan Corbet <corbet@....net>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Juergen Gross <jgross@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tony Luck <tony.luck@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Alexey Kardashevskiy <aik@....com>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 1/8] x86/cpu, kvm: Add support for CPUID_80000021_EAX

On Mon, Jan 23, 2023, Kim Phillips wrote:
> Add support for CPUID leaf 80000021, EAX. The majority of the features will be
> used in the kernel and thus a separate leaf is appropriate.
> 
> Include KVM's reverse_cpuid entry because features are used by VM guests, too.

Nit, "KVM guests", not "VM guests".